Hi, can't comment on the RMIT diploma as I didn't enrol for that, however I started their flight training at Point Cook and left very quickly as it was a disgrace. It is merely GFS paying for the RMIT name. Keep well away from them. They want your money and will fly you in any conditions. I moved to a small country school and never looked back. I don't know any schools I can suggest in town however I am sure you will get other respondents who can.
Good Luck!